Here is a small collection of large rotor-router aggregations. These images were produced using an algorithm developed in this paper by Tobias Friedrich and Lionel Levine on the HPI Future SOC Lab. Some more explanation about the theory behind it, can be found here. Use your scroll wheel or double click to zoom in and out. The color scheme is always left=yellow, down=red, right=blue, and up=green.
The rotor-router model can also be studied full-screen for two sizes: 1 billion and 10 billion chips. In full-screen mode, you can change the colors by clicking the blue wrench icon at the top left. For a full screen version of the following aggregations, you can click the respective caption.